// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "net/http/http_auth_handler_negotiate.h"

#include <string>

#include "base/memory/ptr_util.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "net/base/net_errors.h"
#include "net/base/test_completion_callback.h"
#include "net/dns/mock_host_resolver.h"
#include "net/http/http_request_info.h"
#include "net/http/mock_allow_http_auth_preferences.h"
#include "net/ssl/ssl_info.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "testing/platform_test.h"

#if defined(OS_ANDROID)
#include "net/android/dummy_spnego_authenticator.h"
#elif defined(OS_WIN)
#include "net/http/mock_sspi_library_win.h"
#elif defined(OS_POSIX)
#include "net/http/mock_gssapi_library_posix.h"
#endif

namespace net {

#if defined(OS_ANDROID)
typedef net::android::DummySpnegoAuthenticator MockAuthLibrary;
#elif defined(OS_WIN)
typedef MockSSPILibrary MockAuthLibrary;
#elif defined(OS_POSIX)
typedef test::MockGSSAPILibrary MockAuthLibrary;
#endif

class HttpAuthHandlerNegotiateTest : public PlatformTest {
public:
    void SetUp() override
    {
        auth_library_ = new MockAuthLibrary();
        resolver_.reset(new MockHostResolver());
        resolver_->rules()->AddIPLiteralRule("alias", "10.0.0.2",
            "canonical.example.com");

        http_auth_preferences_.reset(new MockAllowHttpAuthPreferences());
        factory_.reset(new HttpAuthHandlerNegotiate::Factory());
        factory_->set_http_auth_preferences(http_auth_preferences_.get());
#if defined(OS_ANDROID)
        http_auth_preferences_->set_auth_android_negotiate_account_type(
            "org.chromium.test.DummySpnegoAuthenticator");
        MockAuthLibrary::EnsureTestAccountExists();
#endif
#if defined(OS_WIN) || (defined(OS_POSIX) && !defined(OS_ANDROID))
        factory_->set_library(base::WrapUnique(auth_library_));
#endif
        factory_->set_host_resolver(resolver_.get());
    }

#if defined(OS_ANDROID)
    void TearDown() override
    {
        MockAuthLibrary::RemoveTestAccounts();
    }
#endif

    void SetupMocks(MockAuthLibrary* mock_library)
    {
#if defined(OS_WIN)
        security_package_.reset(new SecPkgInfoW);
        memset(security_package_.get(), 0x0, sizeof(SecPkgInfoW));
        security_package_->cbMaxToken = 1337;
        mock_library->ExpectQuerySecurityPackageInfo(
            L"Negotiate", SEC_E_OK, security_package_.get());
#elif defined(OS_POSIX)
        // Copied from an actual transaction!
        static const char kAuthResponse[] = "\x60\x82\x02\xCA\x06\x09\x2A\x86\x48\x86\xF7\x12\x01\x02\x02\x01"
                                            "\x00\x6E\x82\x02\xB9\x30\x82\x02\xB5\xA0\x03\x02\x01\x05\xA1\x03"
                                            "\x02\x01\x0E\xA2\x07\x03\x05\x00\x00\x00\x00\x00\xA3\x82\x01\xC1"
                                            "\x61\x82\x01\xBD\x30\x82\x01\xB9\xA0\x03\x02\x01\x05\xA1\x16\x1B"
                                            "\x14\x55\x4E\x49\x58\x2E\x43\x4F\x52\x50\x2E\x47\x4F\x4F\x47\x4C"
                                            "\x45\x2E\x43\x4F\x4D\xA2\x2C\x30\x2A\xA0\x03\x02\x01\x01\xA1\x23"
                                            "\x30\x21\x1B\x04\x68\x6F\x73\x74\x1B\x19\x6E\x69\x6E\x6A\x61\x2E"
                                            "\x63\x61\x6D\x2E\x63\x6F\x72\x70\x2E\x67\x6F\x6F\x67\x6C\x65\x2E"
                                            "\x63\x6F\x6D\xA3\x82\x01\x6A\x30\x82\x01\x66\xA0\x03\x02\x01\x10"
                                            "\xA1\x03\x02\x01\x01\xA2\x82\x01\x58\x04\x82\x01\x54\x2C\xB1\x2B"
                                            "\x0A\xA5\xFF\x6F\xEC\xDE\xB0\x19\x6E\x15\x20\x18\x0C\x42\xB3\x2C"
                                            "\x4B\xB0\x37\x02\xDE\xD3\x2F\xB4\xBF\xCA\xEC\x0E\xF9\xF3\x45\x6A"
                                            "\x43\xF3\x8D\x79\xBD\xCB\xCD\xB2\x2B\xB8\xFC\xD6\xB4\x7F\x09\x48"
                                            "\x14\xA7\x4F\xD2\xEE\xBC\x1B\x2F\x18\x3B\x81\x97\x7B\x28\xA4\xAF"
                                            "\xA8\xA3\x7A\x31\x1B\xFC\x97\xB6\xBA\x8A\x50\x50\xD7\x44\xB8\x30"
                                            "\xA4\x51\x4C\x3A\x95\x6C\xA1\xED\xE2\xEF\x17\xFE\xAB\xD2\xE4\x70"
                                            "\xDE\xEB\x7E\x86\x48\xC5\x3E\x19\x5B\x83\x17\xBB\x52\x26\xC0\xF3"
                                            "\x38\x0F\xB0\x8C\x72\xC9\xB0\x8B\x99\x96\x18\xE1\x9E\x67\x9D\xDC"
                                            "\xF5\x39\x80\x70\x35\x3F\x98\x72\x16\x44\xA2\xC0\x10\xAA\x70\xBD"
                                            "\x06\x6F\x83\xB1\xF4\x67\xA4\xBD\xDA\xF7\x79\x1D\x96\xB5\x7E\xF8"
                                            "\xC6\xCF\xB4\xD9\x51\xC9\xBB\xB4\x20\x3C\xDD\xB9\x2C\x38\xEA\x40"
                                            "\xFB\x02\x6C\xCB\x48\x71\xE8\xF4\x34\x5B\x63\x5D\x13\x57\xBD\xD1"
                                            "\x3D\xDE\xE8\x4A\x51\x6E\xBE\x4C\xF5\xA3\x84\xF7\x4C\x4E\x58\x04"
                                            "\xBE\xD1\xCC\x22\xA0\x43\xB0\x65\x99\x6A\xE0\x78\x0D\xFC\xE1\x42"
                                            "\xA9\x18\xCF\x55\x4D\x23\xBD\x5C\x0D\xB5\x48\x25\x47\xCC\x01\x54"
                                            "\x36\x4D\x0C\x6F\xAC\xCD\x33\x21\xC5\x63\x18\x91\x68\x96\xE9\xD1"
                                            "\xD8\x23\x1F\x21\xAE\x96\xA3\xBD\x27\xF7\x4B\xEF\x4C\x43\xFF\xF8"
                                            "\x22\x57\xCF\x68\x6C\x35\xD5\x21\x48\x5B\x5F\x8F\xA5\xB9\x6F\x99"
                                            "\xA6\xE0\x6E\xF0\xC5\x7C\x91\xC8\x0B\x8A\x4B\x4E\x80\x59\x02\xE9"
                                            "\xE8\x3F\x87\x04\xA6\xD1\xCA\x26\x3C\xF0\xDA\x57\xFA\xE6\xAF\x25"
                                            "\x43\x34\xE1\xA4\x06\x1A\x1C\xF4\xF5\x21\x9C\x00\x98\xDD\xF0\xB4"
                                            "\x8E\xA4\x81\xDA\x30\x81\xD7\xA0\x03\x02\x01\x10\xA2\x81\xCF\x04"
                                            "\x81\xCC\x20\x39\x34\x60\x19\xF9\x4C\x26\x36\x46\x99\x7A\xFD\x2B"
                                            "\x50\x8B\x2D\x47\x72\x38\x20\x43\x0E\x6E\x28\xB3\xA7\x4F\x26\xF1"
                                            "\xF1\x7B\x02\x63\x58\x5A\x7F\xC8\xD0\x6E\xF5\xD1\xDA\x28\x43\x1B"
                                            "\x6D\x9F\x59\x64\xDE\x90\xEA\x6C\x8C\xA9\x1B\x1E\x92\x29\x24\x23"
                                            "\x2C\xE3\xEA\x64\xEF\x91\xA5\x4E\x94\xE1\xDC\x56\x3A\xAF\xD5\xBC"
                                            "\xC9\xD3\x9B\x6B\x1F\xBE\x40\xE5\x40\xFF\x5E\x21\xEA\xCE\xFC\xD5"
                                            "\xB0\xE5\xBA\x10\x94\xAE\x16\x54\xFC\xEB\xAB\xF1\xD4\x20\x31\xCC"
                                            "\x26\xFE\xBE\xFE\x22\xB6\x9B\x1A\xE5\x55\x2C\x93\xB7\x3B\xD6\x4C"
                                            "\x35\x35\xC1\x59\x61\xD4\x1F\x2E\x4C\xE1\x72\x8F\x71\x4B\x0C\x39"
                                            "\x80\x79\xFA\xCD\xEA\x71\x1B\xAE\x35\x41\xED\xF9\x65\x0C\x59\xF8"
                                            "\xE1\x27\xDA\xD6\xD1\x20\x32\xCD\xBF\xD1\xEF\xE2\xED\xAD\x5D\xA7"
                                            "\x69\xE3\x55\xF9\x30\xD3\xD4\x08\xC8\xCA\x62\xF8\x64\xEC\x9B\x92"
                                            "\x1A\xF1\x03\x2E\xCC\xDC\xEB\x17\xDE\x09\xAC\xA9\x58\x86";
        test::GssContextMockImpl context1(
            "localhost", // Source name
            "example.com", // Target name
            23, // Lifetime
            *CHROME_GSS_SPNEGO_MECH_OID_DESC, // Mechanism
            0, // Context flags
            1, // Locally initiated
            0); // Open
        test::GssContextMockImpl context2(
            "localhost", // Source name
            "example.com", // Target name
            23, // Lifetime
            *CHROME_GSS_SPNEGO_MECH_OID_DESC, // Mechanism
            0, // Context flags
            1, // Locally initiated
            1); // Open
        MockAuthLibrary::SecurityContextQuery queries[] = {
            MockAuthLibrary::SecurityContextQuery(
                "Negotiate", // Package name
                GSS_S_CONTINUE_NEEDED, // Major response code
                0, // Minor response code
                context1, // Context
                NULL, // Expected input token
                kAuthResponse), // Output token
            MockAuthLibrary::SecurityContextQuery(
                "Negotiate", // Package name
                GSS_S_COMPLETE, // Major response code
                0, // Minor response code
                context2, // Context
                kAuthResponse, // Expected input token
                kAuthResponse) // Output token
        };

        for (size_t i = 0; i < arraysize(queries); ++i) {
            mock_library->ExpectSecurityContext(queries[i].expected_package,
                queries[i].response_code,
                queries[i].minor_response_code,
                queries[i].context_info,
                queries[i].expected_input_token,
                queries[i].output_token);
        }
#endif // defined(OS_POSIX)
    }

#if defined(OS_POSIX)
    void SetupErrorMocks(MockAuthLibrary* mock_library,
        int major_status,
        int minor_status)
    {
        const gss_OID_desc kDefaultMech = { 0, NULL };
        test::GssContextMockImpl context(
            "localhost", // Source name
            "example.com", // Target name
            0, // Lifetime
            kDefaultMech, // Mechanism
            0, // Context flags
            1, // Locally initiated
            0); // Open
        MockAuthLibrary::SecurityContextQuery query(
            "Negotiate", // Package name
            major_status, // Major response code
            minor_status, // Minor response code
            context, // Context
            NULL, // Expected input token
            NULL); // Output token

        mock_library->ExpectSecurityContext(query.expected_package,
            query.response_code,
            query.minor_response_code,
            query.context_info,
            query.expected_input_token,
            query.output_token);
    }

#endif // defined(OS_POSIX)

    int CreateHandler(bool disable_cname_lookup,
        bool use_port,
        bool synchronous_resolve_mode,
        const std::string& url_string,
        std::unique_ptr<HttpAuthHandlerNegotiate>* handler)
    {
        http_auth_preferences_->set_negotiate_disable_cname_lookup(
            disable_cname_lookup);
        http_auth_preferences_->set_negotiate_enable_port(use_port);
        resolver_->set_synchronous_mode(synchronous_resolve_mode);
        GURL gurl(url_string);

        // Note: This is a little tricky because CreateAuthHandlerFromString
        // expects a std::unique_ptr<HttpAuthHandler>* rather than a
        // std::unique_ptr<HttpAuthHandlerNegotiate>*. This needs to do the cast
        // after creating the handler, and make sure that generic_handler
        // no longer holds on to the HttpAuthHandlerNegotiate object.
        std::unique_ptr<HttpAuthHandler> generic_handler;
        SSLInfo null_ssl_info;
        int rv = factory_->CreateAuthHandlerFromString(
            "Negotiate", HttpAuth::AUTH_SERVER, null_ssl_info, gurl, BoundNetLog(),
            &generic_handler);
        if (rv != OK)
            return rv;
        HttpAuthHandlerNegotiate* negotiate_handler = static_cast<HttpAuthHandlerNegotiate*>(generic_handler.release());
        handler->reset(negotiate_handler);
        return rv;
    }

    MockAuthLibrary* AuthLibrary() { return auth_library_; }

private:
#if defined(OS_WIN)
    std::unique_ptr<SecPkgInfoW> security_package_;
#endif
    // |auth_library_| is passed to |factory_|, which assumes ownership of it, but
    // can't be a scoped pointer to it since the tests need access when they set
    // up the mocks after passing ownership.
    MockAuthLibrary* auth_library_;
    std::unique_ptr<MockHostResolver> resolver_;
    std::unique_ptr<MockAllowHttpAuthPreferences> http_auth_preferences_;
    std::unique_ptr<HttpAuthHandlerNegotiate::Factory> factory_;
};

TEST_F(HttpAuthHandlerNegotiateTest, DisableCname)
{
    SetupMocks(AuthLibrary());
    std::unique_ptr<HttpAuthHandlerNegotiate> auth_handler;
    EXPECT_EQ(OK, CreateHandler(true, false, true, "http://alias:500", &auth_handler));

    ASSERT_TRUE(auth_handler.get() != NULL);
    TestCompletionCallback callback;
    HttpRequestInfo request_info;
    std::string token;
    EXPECT_EQ(OK, callback.GetResult(auth_handler->GenerateAuthToken(NULL, &request_info, callback.callback(), &token)));
#if defined(OS_WIN)
    EXPECT_EQ("HTTP/alias", auth_handler->spn());
#elif defined(OS_POSIX)
    EXPECT_EQ("HTTP@alias", auth_handler->spn());
#endif
}

TEST_F(HttpAuthHandlerNegotiateTest, DisableCnameStandardPort)
{
    SetupMocks(AuthLibrary());
    std::unique_ptr<HttpAuthHandlerNegotiate> auth_handler;
    EXPECT_EQ(OK, CreateHandler(true, true, true, "http://alias:80", &auth_handler));
    ASSERT_TRUE(auth_handler.get() != NULL);
    TestCompletionCallback callback;
    HttpRequestInfo request_info;
    std::string token;
    EXPECT_EQ(OK, callback.GetResult(auth_handler->GenerateAuthToken(NULL, &request_info, callback.callback(), &token)));
#if defined(OS_WIN)
    EXPECT_EQ("HTTP/alias", auth_handler->spn());
#elif defined(OS_POSIX)
    EXPECT_EQ("HTTP@alias", auth_handler->spn());
#endif
}

TEST_F(HttpAuthHandlerNegotiateTest, DisableCnameNonstandardPort)
{
    SetupMocks(AuthLibrary());
    std::unique_ptr<HttpAuthHandlerNegotiate> auth_handler;
    EXPECT_EQ(OK, CreateHandler(true, true, true, "http://alias:500", &auth_handler));
    ASSERT_TRUE(auth_handler.get() != NULL);
    TestCompletionCallback callback;
    HttpRequestInfo request_info;
    std::string token;
    EXPECT_EQ(OK, callback.GetResult(auth_handler->GenerateAuthToken(NULL, &request_info, callback.callback(), &token)));
#if defined(OS_WIN)
    EXPECT_EQ("HTTP/alias:500", auth_handler->spn());
#elif defined(OS_POSIX)
    EXPECT_EQ("HTTP@alias:500", auth_handler->spn());
#endif
}

TEST_F(HttpAuthHandlerNegotiateTest, CnameSync)
{
    SetupMocks(AuthLibrary());
    std::unique_ptr<HttpAuthHandlerNegotiate> auth_handler;
    EXPECT_EQ(OK, CreateHandler(false, false, true, "http://alias:500", &auth_handler));
    ASSERT_TRUE(auth_handler.get() != NULL);
    TestCompletionCallback callback;
    HttpRequestInfo request_info;
    std::string token;
    EXPECT_EQ(OK, callback.GetResult(auth_handler->GenerateAuthToken(NULL, &request_info, callback.callback(), &token)));
#if defined(OS_WIN)
    EXPECT_EQ("HTTP/canonical.example.com", auth_handler->spn());
#elif defined(OS_POSIX)
    EXPECT_EQ("HTTP@canonical.example.com", auth_handler->spn());
#endif
}

TEST_F(HttpAuthHandlerNegotiateTest, CnameAsync)
{
    SetupMocks(AuthLibrary());
    std::unique_ptr<HttpAuthHandlerNegotiate> auth_handler;
    EXPECT_EQ(OK, CreateHandler(false, false, false, "http://alias:500", &auth_handler));
    ASSERT_TRUE(auth_handler.get() != NULL);
    TestCompletionCallback callback;
    HttpRequestInfo request_info;
    std::string token;
    EXPECT_EQ(ERR_IO_PENDING, auth_handler->GenerateAuthToken(NULL, &request_info, callback.callback(), &token));
    EXPECT_EQ(OK, callback.WaitForResult());
#if defined(OS_WIN)
    EXPECT_EQ("HTTP/canonical.example.com", auth_handler->spn());
#elif defined(OS_POSIX)
    EXPECT_EQ("HTTP@canonical.example.com", auth_handler->spn());
#endif
}

#if defined(OS_POSIX)

// This test is only for GSSAPI, as we can't use explicit credentials with
// that library.
TEST_F(HttpAuthHandlerNegotiateTest, ServerNotInKerberosDatabase)
{
    SetupErrorMocks(AuthLibrary(), GSS_S_FAILURE, 0x96C73A07); // No server
    std::unique_ptr<HttpAuthHandlerNegotiate> auth_handler;
    EXPECT_EQ(OK, CreateHandler(false, false, false, "http://alias:500", &auth_handler));
    ASSERT_TRUE(auth_handler.get() != NULL);
    TestCompletionCallback callback;
    HttpRequestInfo request_info;
    std::string token;
    EXPECT_EQ(ERR_IO_PENDING, auth_handler->GenerateAuthToken(NULL, &request_info, callback.callback(), &token));
    EXPECT_EQ(ERR_MISSING_AUTH_CREDENTIALS, callback.WaitForResult());
}

// This test is only for GSSAPI, as we can't use explicit credentials with
// that library.
TEST_F(HttpAuthHandlerNegotiateTest, NoKerberosCredentials)
{
    SetupErrorMocks(AuthLibrary(), GSS_S_FAILURE, 0x96C73AC3); // No credentials
    std::unique_ptr<HttpAuthHandlerNegotiate> auth_handler;
    EXPECT_EQ(OK, CreateHandler(false, false, false, "http://alias:500", &auth_handler));
    ASSERT_TRUE(auth_handler.get() != NULL);
    TestCompletionCallback callback;
    HttpRequestInfo request_info;
    std::string token;
    EXPECT_EQ(ERR_IO_PENDING, auth_handler->GenerateAuthToken(NULL, &request_info, callback.callback(), &token));
    EXPECT_EQ(ERR_MISSING_AUTH_CREDENTIALS, callback.WaitForResult());
}

#if defined(DLOPEN_KERBEROS)
TEST_F(HttpAuthHandlerNegotiateTest, MissingGSSAPI)
{
    std::unique_ptr<HostResolver> host_resolver(new MockHostResolver());
    MockAllowHttpAuthPreferences http_auth_preferences;
    std::unique_ptr<HttpAuthHandlerNegotiate::Factory> negotiate_factory(
        new HttpAuthHandlerNegotiate::Factory());
    negotiate_factory->set_host_resolver(host_resolver);
    negotiate_factory->set_http_auth_preferences(&http_auth_preferences);
    negotiate_factory->set_library(base::WrapUnique(
        new GSSAPISharedLibrary("/this/library/does/not/exist")));

    GURL gurl("http://www.example.com");
    std::unique_ptr<HttpAuthHandler> generic_handler;
    int rv = negotiate_factory->CreateAuthHandlerFromString(
        "Negotiate",
        HttpAuth::AUTH_SERVER,
        gurl,
        BoundNetLog(),
        &generic_handler);
    EXPECT_EQ(ERR_UNSUPPORTED_AUTH_SCHEME, rv);
    EXPECT_TRUE(generic_handler.get() == NULL);
}
#endif // defined(DLOPEN_KERBEROS)

#endif // defined(OS_POSIX)

} // namespace net
